CVE-2025-38379
published 2025-07-25CVE-2025-38379: In the Linux kernel, the following vulnerability has been resolved: smb: client: fix warning when reconnecting channel When reconnecting a channel in…
PriorityP421medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.34%
26.4th percentile
In the Linux kernel, the following vulnerability has been resolved:
smb: client: fix warning when reconnecting channel
When reconnecting a channel in smb2_reconnect_server(), a dummy tcon
is passed down to smb2_reconnect() with ->query_interface
uninitialized, so we can't call queue_delayed_work() on it.
Fix the following warning by ensuring that we're queueing the delayed
worker from correct tcon.
WARNING: CPU: 4 PID: 1126 at kernel/workqueue.c:2498 __queue_delayed_work+0x1d2/0x200
Modules linked in: cifs cifs_arc4 nls_ucs2_utils cifs_md4 [last unloaded: cifs]
CPU: 4 UID: 0 PID: 1126 Comm: kworker/4:0 Not tainted 6.16.0-rc3 #5 PREEMPT(voluntary)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-4.fc42 04/01/2014
Workqueue: cifsiod smb2_reconnect_server [cifs]
RIP: 0010:__queue_delayed_work+0x1d2/0x200
Code: 41 5e 41 5f e9 7f ee ff ff 90 0f 0b 90 e9 5d ff ff ff bf 02 00
00 00 e8 6c f3 07 00 89 c3 eb bd 90 0f 0b 90 e9 57 f> 0b 90 e9 65 fe
ff ff 90 0f 0b 90 e9 72 fe ff ff 90 0f 0b 90 e9
RSP: 0018:ffffc900014afad8 EFLAGS: 00010003
RAX: 0000000000000000 RBX: ffff888124d99988 RCX: ffffffff81399cc1
RDX: dffffc0000000000 RSI: ffff888114326e00 RDI: ffff888124d999f0
RBP: 000000000000ea60 R08: 0000000000000001 R09: ffffed10249b3331
R10: ffff888124d9998f R11: 0000000000000004 R12: 0000000000000040
R13: ffff888114326e00 R14: ffff888124d999d8 R15: ffff888114939020
FS: 0000000000000000(0000) GS:ffff88829f7fe000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe7a2b4038 CR3: 0000000120a6f000 CR4: 0000000000750ef0
PKRU: 55555554
Call Trace:
queue_delayed_work_on+0xb4/0xc0
smb2_reconnect+0xb22/0xf50 [cifs]
smb2_reconnect_server+0x413/0xd40 [cifs]
? __pfx_smb2_reconnect_server+0x10/0x10 [cifs]
? local_clock_noinstr+0xd/0xd0
? local_clock+0x15/0x30
? lock_release+0x29b/0x390
process_one_work+0x4c5/0xa10
? __pfx_process_one_work+0x10/0x10
? __list_add_valid_or_report+0x37/0x120
worker_thread+0x2f1/0x5a0
? __kthread_parkme+0xde
Affected
19 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.12.37-1 (forky) | linux 6.12.37-1 (forky) |
| linux | linux | >= 202d7e838967dda02855cd925db7fd8c52c56af7 < 0cee638d92ac898d73eccc4e4bab70e9fc95946a | 0cee638d92ac898d73eccc4e4bab70e9fc95946a |
| linux | linux | >= 2c34f1e095a12be3674fb79d84d1af7896e49245 < 3f6932ef25378794894c3c1024092ad14da2d330 | 3f6932ef25378794894c3c1024092ad14da2d330 |
| linux | linux | >= 42ca547b13a20e7cbb04fbdf8d5f089ac4bb35b7 < 3bbe46716092d8ef6b0df4b956f585c5cd0fc78e | 3bbe46716092d8ef6b0df4b956f585c5cd0fc78e |
| linux | linux | >= 4f81ee0af2b8c4089e308f7cb6b5ea5a4efe5b94 < 9d2b629a9dc5c72537645533af1cb11a7d34c4b1 | 9d2b629a9dc5c72537645533af1cb11a7d34c4b1 |
| linux | linux | >= 6.12.35 < 6.12.37 | 6.12.37 |
| linux | linux | >= 6.15.4 < 6.15.6 | 6.15.6 |
| linux | linux | >= 6.6.95 < 6.6.97 | 6.6.97 |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 6.12.37-1 | 6.12.37-1 |
| linux | linux_kernel | >= 0 < 6.12.37-1 | 6.12.37-1 |
| linux | linux_kernel | >= 6.12.35 < 6.12.37 | 6.12.37 |
| linux | linux_kernel | >= 6.15.4 < 6.15.6 | 6.15.6 |
| linux | linux_kernel | >= 6.6.95 < 6.6.97 | 6.6.97 |
| msrc | azl3_kernel_6.6.96.2-1_on_azure_linux_3.0 | — | — |
| msrc | azl3_kernel_6.6.96.2-2_on_azure_linux_3.0 | — | — |
CVSS provenance
nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_msrc7.1HIGH
vendor_debian5.5LOW
vendor_redhat5.5MEDIUM
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Red Hat
kernel: Linux kernel SMB client: Denial of Service via uninitialized object during channel reconnection
vendor_redhat·2025-07-25·CVSS 5.5
CVE-2025-38379 [MEDIUM] CWE-824 kernel: Linux kernel SMB client: Denial of Service via uninitialized object during channel reconnection
kernel: Linux kernel SMB client: Denial of Service via uninitialized object during channel reconnection
In the Linux kernel, the following vulnerability has been resolved:
smb: client: fix warning when reconnecting channel
When reconnecting a channel in smb2_reconnect_server(), a dummy tcon
is passed down to smb2_reconnect() with ->query_interface
uninitialized, so we can't call queue_delayed_work() on it.
Fix the following warning by ensuring that we're queueing the delayed
worker from correct tcon.
WARNING: CPU: 4 PID: 1126 at kernel/workqueue.c:2498 __queue_delayed_work+0x1d2/0x200
Modules linked in: cifs cifs_arc4 nls_ucs2_utils cifs_md4 [last unloaded: cifs]
CPU: 4 UID: 0 PID: 1126 Comm: kworker/4:0 Not tainted 6.16.0-rc3 #5 PREEMPT(voluntary)
Hardware name: QEMU Standard PC (Q35 + I
Microsoft
smb: client: fix warning when reconnecting channel
vendor_msrc·2025-07-08·CVSS 7.1
CVE-2025-38379 [MEDIUM] smb: client: fix warning when reconnecting channel
smb: client: fix warning when reconnecting channel
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.
Mariner: Mariner
Linux: Linux
Customer Action Required: Yes
Remediation: CBL-Mariner Releases
Reference: https://learn.micr
Debian
CVE-2025-38379: linux - In the Linux kernel, the following vulnerability has been resolved: smb: client...
vendor_debian·2025·CVSS 5.5
CVE-2025-38379 [MEDIUM] CVE-2025-38379: linux - In the Linux kernel, the following vulnerability has been resolved: smb: client...
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix warning when reconnecting channel When reconnecting a channel in smb2_reconnect_server(), a dummy tcon is passed down to smb2_reconnect() with ->query_interface uninitialized, so we can't call queue_delayed_work() on it. Fix the following warning by ensuring that we're queueing the delayed worker from correct tcon. WARNING: CPU: 4 PID: 1126 at kernel/workqueue.c:2498 __queue_delayed_work+0x1d2/0x200 Modules linked in: cifs cifs_arc4 nls_ucs2_utils cifs_md4 [last unloaded: cifs] CPU: 4 UID: 0 PID: 1126 Comm: kworker/4:0 Not tainted 6.16.0-rc3 #5 PREEMPT(voluntary) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-4.fc42 04/01/2014 Workqueue: cifsiod smb2_reconnect_server [cifs] RIP: 0010:__que
OSV
CVE-2025-38379: In the Linux kernel, the following vulnerability has been resolved: smb: client: fix warning when reconnecting channel When reconnecting a channel in
osv·2025-07-25·CVSS 5.5
CVE-2025-38379 [MEDIUM] CVE-2025-38379: In the Linux kernel, the following vulnerability has been resolved: smb: client: fix warning when reconnecting channel When reconnecting a channel in
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix warning when reconnecting channel When reconnecting a channel in smb2_reconnect_server(), a dummy tcon is passed down to smb2_reconnect() with ->query_interface uninitialized, so we can't call queue_delayed_work() on it. Fix the following warning by ensuring that we're queueing the delayed worker from correct tcon. WARNING: CPU: 4 PID: 1126 at kernel/workqueue.c:2498 __queue_delayed_work+0x1d2/0x200 Modules linked in: cifs cifs_arc4 nls_ucs2_utils cifs_md4 [last unloaded: cifs] CPU: 4 UID: 0 PID: 1126 Comm: kworker/4:0 Not tainted 6.16.0-rc3 #5 PREEMPT(voluntary) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-4.fc42 04/01/2014 Workqueue: cifsiod smb2_reconnect_server [cifs] RIP: 0010:__que
GHSA
GHSA-mj73-cg42-f79h: In the Linux kernel, the following vulnerability has been resolved:
smb: client: fix warning when reconnecting channel
When reconnecting a channel i
ghsa_unreviewed·2025-07-25
CVE-2025-38379 [MEDIUM] GHSA-mj73-cg42-f79h: In the Linux kernel, the following vulnerability has been resolved:
smb: client: fix warning when reconnecting channel
When reconnecting a channel i
In the Linux kernel, the following vulnerability has been resolved:
smb: client: fix warning when reconnecting channel
When reconnecting a channel in smb2_reconnect_server(), a dummy tcon
is passed down to smb2_reconnect() with ->query_interface
uninitialized, so we can't call queue_delayed_work() on it.
Fix the following warning by ensuring that we're queueing the delayed
worker from correct tcon.
WARNING: CPU: 4 PID: 1126 at kernel/workqueue.c:2498 __queue_delayed_work+0x1d2/0x200
Modules linked in: cifs cifs_arc4 nls_ucs2_utils cifs_md4 [last unloaded: cifs]
CPU: 4 UID: 0 PID: 1126 Comm: kworker/4:0 Not tainted 6.16.0-rc3 #5 PREEMPT(voluntary)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-4.fc42 04/01/2014
Workqueue: cifsiod smb2_reconnect_server [cifs]
RIP: 0010:_
No detection rules found.
No public exploits indexed.
2025-07-25
Published